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1 /* | |
2 * Copyright (C) 2012 Apple Inc. All rights reserved. | |
3 * | |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions | |
6 * are met: | |
7 * 1. Redistributions of source code must retain the above copyright | |
8 * notice, this list of conditions and the following disclaimer. | |
9 * 2. Redistributions in binary form must reproduce the above copyright | |
10 * notice, this list of conditions and the following disclaimer in the | |
11 * documentation and/or other materials provided with the distribution. | |
12 * | |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 */ | |
25 | |
26 #include "config.h" | |
27 #include "core/rendering/RenderRegionSet.h" | |
28 | |
29 #include "core/rendering/RenderFlowThread.h" | |
30 | |
31 namespace WebCore { | |
32 | |
33 RenderRegionSet::RenderRegionSet(Element* element, RenderFlowThread* flowThread) | |
34 : RenderRegion(element, flowThread) | |
35 { | |
36 } | |
37 | |
38 void RenderRegionSet::expandToEncompassFlowThreadContentsIfNeeded() | |
39 { | |
40 // Whenever the last region is a set, it always expands its region rect to c
onsume all | |
41 // of the flow thread content. This is because it is always capable of gener
ating an | |
42 // infinite number of boxes in order to hold all of the remaining content. | |
43 LayoutRect rect(flowThreadPortionRect()); | |
44 | |
45 // Get the offset within the flow thread in its block progression direction.
Then get the | |
46 // flow thread's remaining logical height including its overflow and expand
our rect | |
47 // to encompass that remaining height and overflow. The idea is that we will
generate | |
48 // additional columns and pages to hold that overflow, since people do write
bad | |
49 // content like <body style="height:0px"> in multi-column layouts. | |
50 bool isHorizontal = flowThread()->isHorizontalWritingMode(); | |
51 LayoutUnit logicalTopOffset = isHorizontal ? rect.y() : rect.x(); | |
52 LayoutRect layoutRect = flowThread()->layoutOverflowRect(); | |
53 LayoutUnit logicalHeightWithOverflow = (isHorizontal ? layoutRect.maxY() : l
ayoutRect.maxX()) - logicalTopOffset; | |
54 setFlowThreadPortionRect(LayoutRect(rect.x(), rect.y(), isHorizontal ? rect.
width() : logicalHeightWithOverflow, isHorizontal ? logicalHeightWithOverflow :
rect.height())); | |
55 } | |
56 | |
57 } | |
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